From 2e0c558064ad6c92624a0a826721a83321b227af Mon Sep 17 00:00:00 2001 From: Amaury Pouly Date: Tue, 22 Oct 2013 00:48:33 +0200 Subject: Introduce rbutil/mkzenboot, a replacement for tools/mkzenboot The old tools/mkzenboot has a number of problems: very hard to maintain, poor integration with rbutil. Restart from scratch by recycling all the crypto and descrambling code, rewrite the actual firmware modification part to handle all scenarios in a much clearer way. The code is ready to be integrated into Rockbox Utility, by using the very similar interface to mkimxboot. I copied all the keys from the old mkzenboot, so it can potentially support the older Creative ports, but since this is untested, I prefer not do so at the moment. However, I did add a "mixed" boot option to support the dualboot style used in the older ports. Change-Id: I80cfc48fa78187baa1b1692e8a30ec7137cea37b --- rbutil/mkzenboot/mkzenboot.c | 689 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 689 insertions(+) create mode 100644 rbutil/mkzenboot/mkzenboot.c (limited to 'rbutil/mkzenboot/mkzenboot.c') diff --git a/rbutil/mkzenboot/mkzenboot.c b/rbutil/mkzenboot/mkzenboot.c new file mode 100644 index 0000000000..396357e6fe --- /dev/null +++ b/rbutil/mkzenboot/mkzenboot.c @@ -0,0 +1,689 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2008 by Maurus Cuelenaere + * Based on zenutils by Rasmus Ry + * Copyright (C) 2013 by Amaury Pouly + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#include +#include +#include +#include +#include "mkzenboot.h" +#include "utils.h" +#include "dualboot.h" + +/** + * Keys used by players + */ +static const char null_key_v1[] = "CTL:N0MAD|PDE0.SIGN."; +static const char null_key_v2[] = "CTL:N0MAD|PDE0.DPMP."; +static const char null_key_v3[] = "CTL:N0MAD|PDE0.DPFP."; +static const char null_key_v4[] = "CTL:Z3N07|PDE0.DPMP."; + +static const char tl_zvm_key[] = "1sN0TM3D az u~may th1nk*" + "Creative Zen Vision:M"; +static const char tl_zvm60_key[] = "1sN0TM3D az u~may th1nk*" + "Creative Zen Vision:M (D" + "VP-HD0004)"; +static const char tl_zen_key[] = "1sN0TM3D az u~may th1nk*" + "Creative ZEN"; +static const char tl_zenxf_key[] = "1sN0TM3D az u~may th1nk*" + "Creative ZEN X-Fi"; +static const char tl_zenmo_key[] = "1sN0TM3D az u~may th1nk*" + "Creative ZEN Mozaic"; +static const char tl_zv_key[] = "1sN0TM3D az u~may th1nk*" + "Creative Zen Vision"; +static const char tl_zvw_key[] = "1sN0TM3D az u~may th1nk*" + "Creative ZEN Vision W"; +static const char tl_zm_key[] = "1sN0TM3D az u~may th1nk*" + "Creative Zen Micro"; +static const char tl_zmp_key[] = "1sN0TM3D az u~may th1nk*" + "Creative Zen MicroPhoto"; +static const char tl_zs_key[] = "1sN0TM3D az u~may th1nk*" + "Creative Zen Sleek"; +static const char tl_zsp_key[] = "1sN0TM3D az u~may th1nk*" + "Creative Zen Sleek Photo"; +static const char tl_zt_key[] = "1sN0TM3D az u~may th1nk*" + "Creative Zen Touch"; +static const char tl_zx_key[] = "1sN0TM3D az u~may th1nk*" + "NOMAD Jukebox Zen Xtra"; +static const char tl_zenv_key[] = "1sN0TM3D az u~may th1nk*" + "Creative ZEN V"; +static const char tl_zenvp_key[] = "1sN0TM3D az u~may th1nk*" + "Creative ZEN V Plus"; +static const char tl_zenvv_key[] = "1sN0TM3D az u~may th1nk*" + "Creative ZEN V (Video)"; + +struct player_info_t +{ + const char* name; + const char* null_key; /* HMAC-SHA1 key */ + const char* tl_key; /* BlowFish key */ + bool big_endian; + char *cinf; +}; + +static struct player_info_t zen_players[] = +{ + {"Zen Vision:M", null_key_v2, tl_zvm_key, false, NULL}, + {"Zen Vision:M 60GB", null_key_v2, tl_zvm60_key, false, NULL}, + {"Zen", null_key_v4, tl_zen_key, false, "Creative ZEN"}, + {"Zen X-Fi", null_key_v4, tl_zenxf_key, false, "Creative ZEN X-Fi"}, + {"Zen Mozaic", null_key_v4, tl_zenmo_key, false, "Creative ZEN Mozaic"}, + {"Zen Vision", null_key_v2, tl_zv_key, false, NULL}, + {"Zen Vision W", null_key_v2, tl_zvw_key, false, NULL}, + {"Zen Micro", null_key_v1, tl_zm_key, true, NULL}, + {"Zen MicroPhoto", null_key_v1, tl_zmp_key, true, NULL}, + {"Zen Sleek", null_key_v1, tl_zs_key, true, NULL}, + {"Zen SleekPhoto", null_key_v1, tl_zsp_key, true, NULL}, + {"Zen Touch", null_key_v1, tl_zt_key, true, NULL}, + {"Zen Xtra", null_key_v1, tl_zx_key, true, NULL}, + {"Zen V", null_key_v3, tl_zenv_key, false, NULL}, + {"Zen V Plus", null_key_v3, tl_zenvp_key, false, NULL}, + {"Zen V Video", null_key_v3, tl_zenvv_key, false, NULL}, + {NULL, NULL, NULL, false, NULL} +}; + +/** + * Information on how to patch firmwares + */ +struct zen_model_desc_t +{ + /* Descriptive name of this model (must match player in zen_players[]) */ + const char *model_name; + /* Model name used in the Rockbox header in ".zen" files - these match the + -add parameter to the "scramble" tool */ + const char *rb_model_name; + /* Model number used to initialise the checksum in the Rockbox header in + ".zen" files - these are the same as MODEL_NUMBER in config-target.h */ + const int rb_model_num; + /* Bootloader load address */ + uint32_t bootloader_addr; + /* Dualboot code for this model */ + const unsigned char *dualboot; + /* Size of dualboot functions for this model */ + int dualboot_size; +}; + +/* keep this consistent with the address in dualboot.lds */ +static const struct zen_model_desc_t zen_models[] = +{ + [MODEL_UNKNOWN] = + { + "Unknown", " ", 0, 0, NULL, 0 + }, + [MODEL_ZENV] = + { + "Zen V", "zenv", 85, 0x60000000, NULL, 0 + }, + [MODEL_ZENXFI] = + { + "Zen X-Fi", "zxfi", 86, 0x41000000, dualboot_zenxfi, sizeof(dualboot_zenxfi) + }, + [MODEL_ZENMOZAIC] = + { + "Zen Mozaic", "zmoz", 87, 0x41000000, dualboot_zenmozaic, sizeof(dualboot_zenmozaic) + }, + [MODEL_ZEN] = + { + "Zen", "zen", 90, 0x41000000, dualboot_zen, sizeof(dualboot_zen) + }, +}; + +/** + * MD5 knowledge base + */ + +struct zen_md5sum_t +{ + /* Device model */ + enum zen_model_t model; + /* md5sum of the file */ + char *md5sum; + /* Version string */ + const char *version; +}; + +static const struct zen_md5sum_t zen_sums[] = +{ + /** Zen Mozaic */ + { + /* Version 1.06.01e */ + MODEL_ZENMOZAIC, "88a856f8273b2bc3fcacf1f067a44aa8", "1.06.01e" + }, + /** Zen X-Fi */ + { + /* Version 1.04.08e */ + MODEL_ZENXFI, "f07e2e75069289a2aa14c6583bd9643b", "1.04.08e" + }, + /** Zen V */ + { + /* Version 1.32.01e */ + MODEL_ZENV, "2f6d3e619557583c30132ac87221bc3e", "1.32.01e" + }, + /** Zen */ + { + /* Version 1.21.03e */ + MODEL_ZEN, "1fe28f587f87ac3c280281db28c42465", "1.21.03e" + } +}; + +#define NR_ZEN_PLAYERS (sizeof(zen_players) / sizeof(zen_players[0])) +#define NR_ZEN_SUMS (sizeof(zen_sums) / sizeof(zen_sums[0])) +#define NR_ZEN_MODELS (sizeof(zen_models) / sizeof(zen_models[0])) + +#define MAGIC_ROCK 0x726f636b /* 'rock' */ +#define MAGIC_RECOVERY 0xfee1dead +#define MAGIC_NORMAL 0xcafebabe + +/** + * Stolen from various places in our codebase + */ + +/** + * EDOC file format + */ +struct edoc_header_t +{ + char magic[4]; + uint32_t total_size; + uint32_t zero; +}; + +struct edoc_section_header_t +{ + uint32_t addr; + uint32_t size; + uint32_t checksum; +}; + +uint32_t edoc_checksum(void *buffer, size_t size) +{ + uint32_t c = 0; + uint32_t *p = buffer; + while(size >= 4) + { + c += *p + (*p >> 16); + p++; + size -= 4; + } + if(size != 0) + printf("[WARN] EDOC Checksum section size is not a multiple of 4 bytes, result is undefined!\n"); + return c & 0xffff; +} + +#define errorf(err, ...) do { printf(__VA_ARGS__); return err; } while(0) + +/** + * How does patching code work + * --------------------------- + * + * All Creative firmwares work the same: they start at 0 and the code sequence at + * 0 always contains the vector table with ldr with offsets: + * 0: e59ff018 ldr pc, [pc, #24] ; 0x20 + * 4: e59ff018 ldr pc, [pc, #24] ; 0x24 + * 8: e59ff018 ldr pc, [pc, #24] ; 0x28 + * c: e59ff018 ldr pc, [pc, #24] ; 0x2c + * 10: e59ff018 ldr pc, [pc, #24] ; 0x30 + * 14: e59ff018 ldr pc, [pc, #24] ; 0x34 + * 18: e59ff018 ldr pc, [pc, #24] ; 0x38 + * 1c: e59ff018 ldr pc, [pc, #24] ; 0x3c + * 20: 0000dbd4 .word start + * 24: 0000dcac .word undef_instr_handler + * 28: 0000dcb0 .word software_int_handler + * 2c: 0000dcb4 .word prefetch_abort_handler + * 30: 0000dcb8 .word data_abort_handler + * 34: 0000dcbc .word reserved_handler + * 38: 0000dcc0 .word irq_handler + * 3c: 0000dd08 .word fiq_handler + * + * To build a dual-boot image, we modify the start address to point to some + * code we added to the image. Specifically we first add the stub, then + * the rockbox image. We also write the old start address to this + * stub so that it can either decide to run rockbox or patch back the + * start address and jump to 0. + * Singleboot and recovery is handled the same way except that both targets use + * the same address and we drop the OF, so we create a fake vector table! + */ + +struct dualboot_footer_t +{ + uint32_t magic; + uint32_t of_addr; + uint32_t rb_addr; + uint32_t boot_arg; +} __attribute__((packed)); + +#define FOOTER_MAGIC 0x1ceb00da + +static enum zen_error_t create_fake_image(uint8_t **fw, uint32_t *fw_size) +{ + /** We need to create a fake EDOC image, so first a header and one section + * header with one data chunk. */ + /** The fake image is as follows: + * 0: e59ff018 ldr pc, [pc, #24] ; 0x20 + * 4: e59ff018 ldr pc, [pc, #24] ; 0x24 + * 8: e59ff018 ldr pc, [pc, #24] ; 0x28 + * c: e59ff018 ldr pc, [pc, #24] ; 0x2c + * 10: e59ff018 ldr pc, [pc, #24] ; 0x30 + * 14: e59ff018 ldr pc, [pc, #24] ; 0x34 + * 18: e59ff018 ldr pc, [pc, #24] ; 0x38 + * 1c: e59ff018 ldr pc, [pc, #24] ; 0x3c + * 20: 00000040 .word hang + * 24: 00000040 .word hang + * 28: 00000040 .word hang + * 2c: 00000040 .word hang + * 30: 00000040 .word hang + * 34: 00000040 .word hang + * 38: 00000040 .word hang + * 3c: 00000040 .word hang + * 40 : + * 40: eafffffe b 40 */ + *fw_size = sizeof(struct edoc_header_t) + sizeof(struct edoc_section_header_t) + 0x44; + *fw = malloc(*fw_size); + if(*fw == NULL) + errorf(ZEN_ERROR, "[ERR] Allocation failed"); + struct edoc_header_t *hdr = (void *)*fw; + memcpy(hdr->magic, "EDOC", 4); + hdr->total_size = *fw_size - sizeof(struct edoc_header_t) + 4; + hdr->zero = 0; + struct edoc_section_header_t *sec = (void *)(hdr + 1); + sec->addr = 0; + sec->size = 0x44; + uint32_t *p = (void *)(sec + 1); + p[0] = p[1] = p[2] = p[3] = p[4] = p[5] = p[6] = p[7] = 0xe59ff018; + p[8] = p[9] = p[10] = p[11] = p[12] = p[13] = p[14] = p[15] = 0x40; + p[16] = 0xeafffffe; + sec->checksum = edoc_checksum(p, 0x44); + return ZEN_SUCCESS; +} + +static enum zen_error_t patch_firmware(uint8_t **fw, uint32_t *fw_size, + void *boot, size_t boot_size, struct zen_option_t opt) +{ + /* check if dualboot stub is available */ + const void *dualboot = zen_models[opt.model].dualboot; + int dualboot_size = zen_models[opt.model].dualboot_size; + uint32_t dualboot_addr = zen_models[opt.model].bootloader_addr; + if(dualboot == NULL) + errorf(ZEN_DONT_KNOW_HOW_TO_PATCH, "[ERR] I don't have a dualboot stub for this model\n"); + /* if not asked to dualboot, drop OF and create a fake image */ + if(opt.output != ZEN_DUALBOOT) + { + enum zen_error_t ret = create_fake_image(fw, fw_size); + if(ret != ZEN_SUCCESS) + return ret; + } + /* compute final image size: add stub + bootloader in one block as a section */ + int extra_size = sizeof(struct edoc_section_header_t) + dualboot_size + boot_size; + *fw_size += extra_size; + *fw = realloc(*fw, *fw_size); + if(*fw == NULL) + errorf(ZEN_ERROR, "[ERR] Allocation failed"); + /* sanity check */ + struct edoc_header_t *hdr = (void *)*fw; + if(memcmp(hdr->magic, "EDOC", 4) != 0) + errorf(ZEN_FW_INVALID, "[ERR] Firmware doesn't use EDOC format\n"); + /* validate image and find OF start addr */ + uint32_t of_addr = 0; + struct edoc_section_header_t *sec_hdr = (void *)(hdr + 1); + while((void *)sec_hdr - (void *)&hdr->zero < hdr->total_size) + { + if(sec_hdr->checksum != edoc_checksum(sec_hdr + 1, sec_hdr->size)) + errorf(ZEN_FW_INVALID, "[ERR] Firmware checksum error\n"); + if(sec_hdr->addr == 0) + { + uint32_t *start_vector = ((void *)(sec_hdr + 1) + 0x20); + /* extract address */ + of_addr = *(uint32_t *)start_vector; + /* patch vector */ + *start_vector = dualboot_addr; + /* fix checksum */ + sec_hdr->checksum = edoc_checksum(sec_hdr + 1, sec_hdr->size); + } + sec_hdr = (void *)(sec_hdr + 1) + sec_hdr->size; + } + if(of_addr == 0) + errorf(ZEN_FW_INVALID, "[ERR] Firmware doesn't have the expected format\n"); + printf("[INFO] OF start address: %#x\n", of_addr); + /* add extra section */ + sec_hdr->addr = dualboot_addr; + sec_hdr->size = dualboot_size + boot_size; + /* add extra data */ + memcpy(sec_hdr + 1, dualboot, dualboot_size); + memcpy((void *)(sec_hdr + 1) + dualboot_size, boot, boot_size); + /* locate and patch dualboot footer */ + struct dualboot_footer_t *footer = (void *)(sec_hdr + 1) + dualboot_size - + sizeof(struct dualboot_footer_t); + if(footer->magic != FOOTER_MAGIC) + errorf(ZEN_FW_INVALID, "[ERR] Footer magic mismatch\n"); + uint32_t rb_addr = dualboot_addr + dualboot_size; + printf("[INFO] RB start address: %#x\n", rb_addr); + footer->of_addr = opt.output == ZEN_DUALBOOT ? of_addr : rb_addr; + footer->rb_addr = rb_addr; + footer->boot_arg = opt.output == ZEN_RECOVERY ? 0xfee1dead : 0xcafebabe; + printf("[INFO] Footer: 0x%08x 0x%08x 0x%08x\n", footer->of_addr, footer->rb_addr, + footer->boot_arg); + /* fix image */ + sec_hdr->checksum = edoc_checksum(sec_hdr + 1, sec_hdr->size); + hdr->total_size += extra_size; + return ZEN_SUCCESS; +} + +struct player_info_t *get_player_info(enum zen_model_t model) +{ + for(int i = 0; zen_players[i].name; i++) + if(strcmp(zen_models[model].model_name, zen_players[i].name) == 0) + return &zen_players[i]; + return NULL; +} + +enum zen_error_t build_firmware(void *exec, size_t exec_size, void *boot, size_t boot_size, + const char *outfile, struct zen_option_t opt) +{ + uint8_t *buffer = exec; + /** find player info */ + struct player_info_t *player = get_player_info(opt.model); + if(player == NULL) + errorf(ZEN_UNSUPPORTED, "[ERR] There is no player info for this model\n"); + if(player->big_endian) + errorf(ZEN_UNSUPPORTED, "[ERR] Big-endian players are currently unsupported\n"); + + /** Find Win32 PE .data section */ + uint32_t data_ptr; + uint32_t data_size; + enum zen_error_t err = find_pe_data(exec, exec_size, &data_ptr, &data_size); + if(err != ZEN_SUCCESS) + errorf(err, "[ERR] Cannot find .data section\n"); + printf("[INFO] .data section is at 0x%x with size 0x%x\n", data_ptr, data_size); + + /** look for firmware and key in data section */ + uint32_t fw_offset = find_firmware_offset(&buffer[data_ptr], data_size); + if(fw_offset == 0) + errorf(ZEN_FW_INVALID, "[ERR] Couldn't find firmware offset\n"); + uint32_t fw_size = le2int(&buffer[data_ptr + fw_offset]); + printf("[INFO] Firmware offset is at 0x%x with size 0x%x\n", data_ptr + fw_offset, fw_size); + const char *fw_key = find_firmware_key(exec, exec_size); + if(fw_key == NULL) + errorf(ZEN_FW_INVALID, "[ERR] Couldn't find firmware key\n"); + printf("[INFO] Firmware key is %s\n", fw_key); + + /** descramble firmware */ + printf("[INFO] Descrambling firmware... "); + if(!crypt_firmware(fw_key, &buffer[data_ptr + fw_offset + 4], fw_size)) + errorf(ZEN_ERROR, "Fail!\n"); + else + printf("Done!\n"); + /** decompress it */ + uint8_t *out_buffer = malloc(fw_size * 2); + if(out_buffer == NULL) + errorf(ZEN_ERROR, "[ERR] Couldn't allocate memory"); + memset(out_buffer, 0, fw_size * 2); + printf("[INFO] Decompressing firmware... "); + char *err_msg; + if(!inflate_to_buffer(&buffer[data_ptr + fw_offset + 4], fw_size, out_buffer, + fw_size * 2, &err_msg)) + errorf(ZEN_ERROR, "Fail!\n[ERR] ZLib error: %s\n", err_msg); + else + printf("Done!\n"); + + /** check format and resize the buffer */ + if(memcmp(out_buffer, "FFIC", 4) != 0) + errorf(ZEN_FW_INVALID, "[ERR] CIFF header doesn't match\n"); + uint32_t ciff_size = le2int(&out_buffer[4]) + 8 + 28; /* CIFF block + NULL block*/ + printf("[INFO] Total firmware size: %d\n", ciff_size); + out_buffer = realloc(out_buffer, ciff_size); + if(out_buffer == NULL) + errorf(ZEN_ERROR, "[ERR] Cannot resize memory block\n"); + + /** look for firmware file */ + printf("[INFO] Locating encoded block... "); + uint32_t fw_off = 8; + uint8_t *cinf_ptr = NULL; + while(memcmp(&out_buffer[fw_off], " LT\xa9", 4) != 0 && fw_off < ciff_size) + { + if(memcmp(&out_buffer[fw_off], "FNIC", 4) == 0) + { + cinf_ptr = &out_buffer[fw_off + 8]; + fw_off += 4 + 4 + 96; + } + else if(memcmp(&out_buffer[fw_off], "ATAD", 4) == 0) + { + fw_off += 4; + fw_off += le2int(&out_buffer[fw_off]); + fw_off += 4; + } + else + errorf(ZEN_FW_INVALID, "Fail!\n[ERR] Unknown block\n"); + } + if(fw_off >= ciff_size || memcmp(&out_buffer[fw_off], " LT\xa9", 4) != 0) + errorf(ZEN_FW_INVALID, "Fail!\n[ERR] Couldn't find encoded block\n"); + if(!cinf_ptr) + errorf(ZEN_FW_INVALID, "Fail!\n[ERR] Couldn't find CINF\n"); + printf("Done!\n"); + + /** validate player if possible */ + printf("[INFO] Checking player model..."); + if(player->cinf) + { + char cinf_ascii[96]; + for(int j = 0; j < 96; j++) + cinf_ascii[j] = *(unsigned short *)&cinf_ptr[2 * j]; + if(strncmp(cinf_ascii, player->cinf, 96) != 0) + errorf(ZEN_FW_MISMATCH, "Fail!\n[ERR] Player mismatch: CINF indicates '%s' instead of '%s'\n", + cinf_ascii, player->cinf); + else + printf("Done!\n"); + } + else + printf("Bypass!\n"); + + /** decrypt firmware */ + printf("[INFO] Decrypting encoded block... "); + uint32_t iv[2]; + iv[0] = 0; + iv[1] = swap(le2int(&out_buffer[fw_off + 4])); + if(!bf_cbc_decrypt((unsigned char*)player->tl_key, strlen(player->tl_key) + 1, + &out_buffer[fw_off + 8], le2int(&out_buffer[fw_off + 4]), (const unsigned char*)&iv)) + errorf(ZEN_ERROR, "Fail!\n[ERR] Couldn't decrypt encoded block\n"); + printf("Done!\n"); + + /** sanity checks on firmware */ + uint32_t jrm_size = le2int(&out_buffer[fw_off + 8]); + if(jrm_size > le2int(&out_buffer[fw_off + 4]) * 3) + errorf(ZEN_FW_INVALID, "[ERR] Decrypted length of encoded block is unexpectedly large: 0x%08x\n", jrm_size); + printf("[INFO] Firmware size: %d\n", jrm_size); + uint8_t *jrm = malloc(jrm_size); + if(jrm == NULL) + errorf(ZEN_ERROR, "[ERR] Couldn't allocate memory\n"); + memset(buffer, 0, jrm_size); + + /** decompress firmware */ + printf("[INFO] Decompressing encoded block... "); + if(!cenc_decode(&out_buffer[fw_off + 12], le2int(&out_buffer[fw_off + 4]) - 4, jrm, jrm_size)) + errorf(ZEN_ERROR, "Fail!\n[ERR] Couldn't decompress the encoded block\n"); + printf("Done!\n"); + + /** Copy OF because patching might modify it */ + void *jrm_save = malloc(jrm_size); + uint32_t jrm_save_size = jrm_size; + if(jrm_save == NULL) + errorf(ZEN_ERROR, "[ERR] Couldn't allocate memory"); + memcpy(jrm_save, jrm, jrm_size); + + /** Patch firmware */ + err = patch_firmware(&jrm, &jrm_size, boot, boot_size, opt); + if(err != ZEN_SUCCESS) + errorf(err, "[ERR] Couldn't patch firmware\n"); + + /** Rebuild archive */ + bool keep_old_bits = opt.output == ZEN_DUALBOOT || opt.output == ZEN_MIXEDBOOT; + bool keep_of = opt.output == ZEN_MIXEDBOOT; + /* if we keep old stuff, keep everything up to LT block, otherwise just CIFF header */ + uint32_t off = keep_old_bits ? fw_off : 8; + /* move the rest of the archive if keeping old stuff */ + if(keep_old_bits) + { + uint32_t copy_off = fw_off + 8 + le2int(&out_buffer[fw_off + 4]); + uint32_t copy_size = ciff_size - fw_off - 8 - le2int(&out_buffer[fw_off + 4]) - 28; + memmove(&out_buffer[off], &out_buffer[copy_off], copy_size); + off += copy_size; + } + /* if we keep the OF, put a copy of it after renaming it to Hcreativeos.jrm */ + if(keep_of) + { + out_buffer = realloc(out_buffer, off + jrm_save_size + 40); + if(out_buffer == NULL) + errorf(ZEN_ERROR, "[ERR] Couldn't resize memory block\n"); + printf("[INFO] Renaming encoded block to Hcreativeos.jrm... "); + memcpy(&out_buffer[off], "ATAD", 4); + int2le(jrm_save_size + 32, &out_buffer[off + 4]); + memset(&out_buffer[off + 8], 0, 32); + memcpy(&out_buffer[off + 8], "H\0c\0r\0e\0a\0t\0i\0v\0e\0o\0s\0.\0j\0r\0m", 30); + memcpy(&out_buffer[off + 40], jrm_save, jrm_save_size); + off += jrm_save_size + 40; + printf("Done!\n"); + } + /* put modified firmware */ + out_buffer = realloc(out_buffer, off + jrm_size + 40); + if(out_buffer == NULL) + errorf(ZEN_ERROR, "[ERR] Couldn't resize memory block\n"); + printf("[INFO] Adding Hjukebox2.jrm... "); + memcpy(&out_buffer[off], "ATAD", 4); + int2le(jrm_size + 32, &out_buffer[off + 4]); + memset(&out_buffer[off + 8], 0, 32); + memcpy(&out_buffer[off + 8], "H\0j\0u\0k\0e\0b\0o\0x\0""2\0.\0j\0r\0m", 26); + memcpy(&out_buffer[off + 40], jrm, jrm_size); + off += jrm_size + 40; + printf("Done!\n"); + + /** fix header */ + int2le(off - 8, &out_buffer[4]); + + /** update checksum */ + printf("[INFO] Updating checksum... "); + out_buffer = realloc(out_buffer, off + 28); + if(out_buffer == NULL) + errorf(ZEN_ERROR, "[ERR] Couldn't resize memory block\n"); + memcpy(&out_buffer[off], "LLUN", 4); + int2le(20, &out_buffer[off + 4]); + hmac_sha1((unsigned char*)player->null_key, strlen(player->null_key), out_buffer, + off, &out_buffer[off + 8]); + off += 28; + printf("Done!\n"); + + err = write_file(outfile, out_buffer, off); + + free(jrm); + free(jrm_save); + free(out_buffer); + return err; +} + +/* find an entry into zen_sums which matches the MD5 sum of a file */ +static enum zen_error_t find_model_by_md5sum(uint8_t file_md5sum[16], int *md5_idx) +{ + int i = 0; + while(i < NR_ZEN_SUMS) + { + uint8_t md5[20]; + if(strlen(zen_sums[i].md5sum) != 32) + errorf(ZEN_ERROR, "[ERR][INTERNAL] Invalid MD5 sum in zen_sums\n"); + for(int j = 0; j < 16; j++) + { + uint8_t a, b; + if(convxdigit(zen_sums[i].md5sum[2 * j], &a) || convxdigit(zen_sums[i].md5sum[2 * j + 1], &b)) + errorf(ZEN_ERROR, "[ERR][INTERNAL] Bad checksum format: %s\n", zen_sums[i].md5sum); + md5[j] = (a << 4) | b; + } + if(memcmp(file_md5sum, md5, 16) == 0) + break; + i++; + } + if(i == NR_ZEN_SUMS) + errorf(ZEN_NO_MATCH, "[ERR] MD5 sum doesn't match any known file\n"); + *md5_idx = i; + return ZEN_SUCCESS; +} + +enum zen_error_t mkzenboot(const char *infile, const char *bootfile, + const char *outfile, struct zen_option_t opt) +{ + /* determine firmware model */ + void *fw; + size_t fw_size; + enum zen_error_t err = read_file(infile, &fw, &fw_size); + uint8_t file_md5sum[16]; + err = compute_md5sum_buf(fw, fw_size, file_md5sum); + if(err != ZEN_SUCCESS) + { + free(fw); + return err; + } + printf("[INFO] MD5 sum of the file: "); + for(int i = 0; i < 16; i++) + printf("%02X ", file_md5sum[i]); + printf("\n"); + if(opt.model == MODEL_UNKNOWN) + { + int idx; + err = find_model_by_md5sum(file_md5sum, &idx); + if(err != ZEN_SUCCESS) + { + free(fw); + errorf(err, "[ERR] Cannot determine model type\n"); + } + opt.model = zen_sums[idx].model; + printf("[INFO] MD5 matches %s, version %s\n", + zen_models[opt.model].model_name, zen_sums[idx].version); + } + printf("[INFO] Model is: %s\n", zen_models[opt.model].model_name); + /* load rockbox file */ + uint8_t *boot; + size_t boot_size; + err = read_file(bootfile, (void **)&boot, &boot_size); + if(err != ZEN_SUCCESS) + { + free(fw); + errorf(err, "[ERR] Cannot read boot file\n"); + } + /* validate checksum */ + if(memcmp(boot + 4, zen_models[opt.model].rb_model_name, 4) != 0) + { + free(fw); + free(boot); + errorf(ZEN_BOOT_MISMATCH, "[ERR] Boot model mismatch\n"); + } + printf("[INFO] Bootloader file matches model\n"); + uint32_t sum = zen_models[opt.model].rb_model_num; + for(int i = 8; i < boot_size; i++) + sum += boot[i]; + if(sum != be2int(boot)) + { + free(fw); + free(boot); + errorf(ZEN_BOOT_CHECKSUM_ERROR, "[ERR] Checksum mismatch\n"); + } + printf("[INFO] Bootloader file checksum is correct\n"); + /* produce file */ + err = build_firmware(fw, fw_size, boot + 8, boot_size - 8, outfile, opt); + free(boot); + free(fw); + return err; +} -- cgit v1.2.3